fix(lua): relax `vim.wait()` timeout validation #36900

Problem:
After bc0635a9fc9c15a2423d4eb35f627d127d00fa46 `vim.wait()` rejects floats
and NaN values.

Solution:
Restore the prior behavior, while still supporting `math.huge`. Update
tests to cover float case.

1 files changed, 3 insertions, 9 deletions

diff --git a/src/nvim/lua/executor.c b/src/nvim/lua/executor.c
index 30d3f26f0e..4073e0f9a8 100644
--- a/src/nvim/lua/executor.c
+++ b/src/nvim/lua/executor.c
@@ -456,15 +456,9 @@ static int nlua_wait(lua_State *lstate)
   if (timeout_number < 0) {
     return luaL_error(lstate, "timeout must be >= 0");
   }
-  int64_t timeout;
-  if (isinf(timeout_number) || timeout_number > (double)INT64_MAX) {
-    timeout = INT64_MAX;
-  } else {
-    if (isnan(timeout_number) || timeout_number != trunc(timeout_number)) {
-      return luaL_error(lstate, "timeout has no integer representation");
-    }
-    timeout = (int64_t)timeout_number;
-  }
+  int64_t timeout = (isnan(timeout_number) || timeout_number > (double)INT64_MAX)
+                    ? INT64_MAX
+                    : (int64_t)timeout_number;
 
   int lua_top = lua_gettop(lstate);